South African-born billionaire Elon Musk, who became a US citizen in 2002 after moving to the country seven years prior, says he's "doing a quiet trial" of president Donald Trump's dubious "gold card" immigration program. The pay-to-enter scheme allows extremely rich foreign "broligarchs" to fast-track their US residency application by shelling out a whopping $5 million upfront — a program Musk personally could've greatly benefited from. "We're doing a quiet trial to make sure the system works properly," he tweeted over the weekend. "Once it is fully tested, it will be rolled out to the public with an announcement by […]